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Performance Engine Kits (Capricorn)

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PBL-1027-C-109/P1833
Product Information
Product Information
Engine cylinders pistions & rings set. Porsche 964 / 993 3.6ltr to 4.0ltr (Ø100 to Ø102.7) Big Bore
SET

Fits:
Porsche 964 3.6ltr to 4.0ltr (Ø100 to Ø102.7) Big Bore
Porsche 993 3.6ltr to 4.0ltr (Ø100 to Ø102.7) Big Bore

Capacity : 3996 cc
Stroke : 80.4 mm
Bore: 102.7mm

Please note the crankcases may need machining, this type of engine modification will need to be made by a engine specialist

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

PBL-1027-C-109
PBL-1027-C-109
P1833

The product you are viewing cross references to these numbers
DISPLAYING 1 to 1 (of 1 products)
About Performance Engine Kits (Capricorn)

Capricorn Performance Engine Kits for Maximum Strength, Precision & Motorsport-Ready Reliability

Capricorn Performance Engine Kits offer a complete, meticulously engineered solution for rebuilding high-performance Porsche engines. These kits include premium components—such as pistons, cylinders, rings and ancillary performance upgrades—designed to withstand extreme loads, elevated temperatures and demanding RPM ranges. Developed with motorsport expertise, Capricorn kits deliver superior durability, consistent power and exceptional accuracy, making them ideal for road-performance upgrades, track-prepared builds and long-term engine restorations.

Whether refreshing a high-mileage engine or constructing a competition-level power unit, Capricorn kits ensure every internal component works together in perfect harmony for peak performance.

What Capricorn Performance Engine Kits Do

These high-precision engine kits are crafted to:

  • Increase structural strength for engines operating under high boost or high RPM
  • Improve combustion stability with precisely machined pistons and cylinders
  • Enhance heat resistance through advanced materials and thermal coatings
  • Reduce frictional losses for smoother, more efficient power delivery
  • Improve sealing and compression, restoring lost horsepower
  • Provide a complete matched set, preventing imbalance or compatibility issues
  • Support both road and motorsport applications with exceptional reliability

Capricorn kits bring engineering excellence to every stage of an engine rebuild.

Why Performance Engines Fail Without Upgraded Components

Engines operating at or beyond their original limits face increased stress, which can lead to premature failure. Common issues include:

  • Heat exhaustion, causing distortion of pistons or cylinders
  • Detonation and pre-ignition, damaging crown surfaces and ring lands
  • Lubrication breakdown, accelerating wear on high-load surfaces
  • Material fatigue from repeated high-RPM stress cycles
  • Cylinder scoring, reducing compression and power
  • Inaccurate component tolerances in ageing or worn engines
  • Boost pressure increases, pushing standard parts beyond safe limits

Symptoms of these failures include oil consumption, smoke, power loss, knocking noises, low compression and misfires.

Why You Should Upgrade With Capricorn Performance Engine Kits

Replacing worn internals with precision-engineered Capricorn components designed to exceed original performance characteristics ensures maximum engine reliability and power.

Benefits include:

  • Superior strength for turbocharged, supercharged and high-compression engines
  • Consistent power delivery even under track-day or racing conditions
  • Improved compression and combustion efficiency
  • Reduced internal wear and extended component life
  • Better heat management for stable operating temperatures
  • Engineered component matching for perfect fit and performance balance
  • Increased confidence when pushing performance limits

Capricorn kits are an essential upgrade for anyone building a truly performance-focused Porsche engine.

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